"The time has come," he said. "The kingdom of God has come near. Repent and believe the good news!"
(NIV)

And saying, The [appointed period of] time is fulfilled (completed), and the kingdom of God is at hand; repent (have a change of mind which issues in regret for past sins and in change of conduct for the better) and believe (trust in, rely on, and adhere to) the good news (the Gospel).
(AMP)

And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.
(KJV)